Revert "classes.singleton: fix "summary" of singletons. Fixes #145."
Revert "classes.singleton: fix "summary" of singletons. Fixes #145."

This reverts commit d820c86974e5317d02ac43a1c32b1aa5f56f872b.

bpollack/factor,slavapestov/factor,slavapestov/factor,AlexIljin/factor,mrjbq7/factor,bjourne/factor,slavapestov/factor,bjourne/factor,bjourne/factor,bjourne/factor,AlexIljin/factor,mrjbq7/factor,factor/factor,factor/factor,tgunr/factor,bpollack/factor,factor/factor,nicolas-p/factor,bpollack/factor,slavapestov/factor,tgunr/factor,bpollack/factor,mrjbq7/factor,tgunr/factor,bjourne/factor,dch/factor,slavapestov/factor,dch/factor,slavapestov/factor,sarvex/factor-lang,mrjbq7/factor,mrjbq7/factor,factor/factor,bjourne/factor,sarvex/factor-lang,nicolas-p/factor,nicolas-p/factor,nicolas-p/factor,bpollack/factor,tgunr/factor,nicolas-p/factor,bpollack/factor,AlexIljin/factor,sarvex/factor-lang,tgunr/factor,dch/factor,AlexIljin/factor,sarvex/factor-lang,dch/factor,AlexIljin/factor,slavapestov/factor,bpollack/factor,dch/factor,sarvex/factor-lang,sarvex/factor-lang,sarvex/factor-lang,nicolas-p/factor,dch/factor,tgunr/factor,mrjbq7/factor,factor/factor,nicolas-p/factor,AlexIljin/factor,bjourne/factor,factor/factor,AlexIljin/factor